Surah 16. An-Nahl, Ayah 105

I.e., the scurrilous allegation referred to in verse {103}. Although this statement alludes,in the first instance, to the hostile contemporaries of the Prophet, it extends, by obvious implication, to people of all times who refuse to believe in the reality of Muhammad's revelations, and try to explain them away as obsessive illusions or even as deliberate fabrications.

It is clearly those who raise the cry of forgery that are guilty of falsehood, as there is not the least basis or even plausibility in their suggestion.